Eyeglass-mounting.



F. A. PERSOHN.

- EYEGLASS MOUNTING.

APPLICATION FILED SEPT. 19, 1913.

1,093,355. Patented Apr. 14, 19M

n lllllllllll more;

FRANK A. PEBSOHN, OF BALTIMORE, MARYLAND.

EYEGLASS-MOUNTIN Gr.

messes.

Application filed September 19, 1913.

2' '0 all whom it may concern Be it known that I, FRANK A. PnRsoHN, a citizen of the UnitediStates, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Eyeglass-Mountings, of which the following is a specification.

This invention relates to an improvement in the springs and mounting of eye-glasses.

This invention provides an improved construction of spring which has two hooks one on its coiled end to engage the post, and a second hook on its free end to engage the pivoted arm of the nose-guard, the hook at the coiled end acting as a self-locker to confine the spring as will be presently set forth.

The invention is illustrated in the accompanying drawing in which,

Figure 1 is a rear elevation of a pair of eyeglasses embodying my invention. Fig. 2 is a top plan view of the same. Fig. 3 is a bottom plan view, on a larger scale, of the mounting for the lens for the left eye and shows part of the improved spring. Fig. 4 is a section view taken on the line 1- 1 of Fig. 2, through the hollow post for the right eye looking toward the left-hand side. Fig. 5 is a front elevation of a left lens, and the mounting partly in section showing thehook on the coiled end of the spring engaged and the free end of spring disengaged. Fig. 6 is a top view of the mounting for the right eye and shows the segment-shaped slot in which the hook on coiled end of spring engages. Fig. 7 is a view of the fiat blank from which the selflocking spring is made.

The lens, 1, nose-bridge, 2, the two straps, 3, that clip the glass lens, and the circular portion or stud, 4E, that connects one end of the nose-bridge with said two clip straps, are all shown in a familiar form. The noseclamping guard, 10, is carried on an arm, 9, that rests on top of said circular portion, l, where it is pivoted by the upper part, 5, and confined by the head, 8, of a screw whose shank is designated, 7 said pivoted arm, 9, also has at the front of the lens the finger piece, 11, two of which serve to open or spread apart the two nose-clamping guards, 10, which together with the nosebridge, 2, hold the eye-glasses to their position.

WVhile the parts mentioned thus far are well known in eye-glass mountings, some of them in their structure have been modi- Specification of Letters Patent.

Fatented Apr. 114, 191 i.

Serial No. 790,596.

fied by me to cooperate with the novel shaped self-locking spring of the present invention. In the drawing the spring is shown in Figs. 3, 4, 5, and 7. The flat blank of sheet-metal from which the spring is made, is shown in Fig. 7. When the spring is finished the part, 15, is coiled, as shown in Figs. 3 and 4:, and near the extremity of this coiled part is a hook, 16, that projects from the edge of the sheet-metal strip upwardly; this hook is formed by producing on the edge of the said strip a proecting tang one edge of which latter is undercut or inclined as at 17. This incline constitutes part of the self-locking feature. The other end, 18, of the spring strip projects and is free, and its extremity also has a hook, 19, that engages the pivoted arm, 9; this second hook is formed by another tang projecting from the same edge of the strip as the first named hook. The said circular connecting portion, 4, has a segment-shaped slot, 20, that opens vertically through the said portion, 41, close to the hollow-post, 5, (see Figs. 3, 4e and 6). At one end this slot has an incline, 21, with which the undercut or inclined hook-edge, 17, of the coiled part of the spring engages. The coils of the spring are around the lower stud, 6, and the said inclined hook, 16, being on the innermost coil projects into the said segment-shaped slot, 20, where it automatically engages or interlocks with the inclined end thereof; these inclines 17-21 keep the coils of the spring from getting off the lower stud, 6. The tension of the free end, 18, of the spring, when its hook, 19, is engaged with the arm, 9, is to press the clamping guard, 10, against a persons nose.

The foregoing description of one spring is equally applicable to both springs.

In practice the connecting portion, 1, has the upper circular hollow-pivot, 5, and the lower hollow stud, 6, made of very thin metal, because in a neatly-made mounting for eye-glasses these parts are necessarily very small. The thinness of these metal parts makes them so frail and weak that when an optician has occasion to disconnect them to make some repair, the use of pliers in the work of repair will often mash the thin parts or cause such injury as to render them useless. I overcome this difficulty by the construction I here show, namely, the upper projecting pivot, 5, and the lower projecting stud, 6, are in practical effect a thin tube or hub internally screw-threaded; and a long screw-threaded shank, 7, passes from the top of the said pivot, 5, entirely through the tube or hub; and internally reinforces the parts that are necessarily made of thin metal, and enables the two jaws of a pair of pliers to be used without endangering the device. One jaw of the pliers may be placed on the head of the screw and the other jaw on the base of the lower stud (or the lower end of the screw) and then these parts may be gripped without injury to them.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. An eye-glass mounting having in COII1- bination a nose-bridge; a lens strap; a circular portion connecting said two parts and having a central tube whose upper and lower ends project from said circular portion and the latter provided with a segment-shaped slot that opens through its top and one end of which slot has an incline, 21; an arm pivoted on one end of said tube; and a sheetmetal spring coiled about the other end of said tube and provided near its coiled end with a hook having an inclined undercut, l7, and entered into said segment-shaped slot and locking therewith.

2. An eye-glass mounting having in combination a nose-bridge; a lens strap; a circular portion connecting said two parts and having a central vertical tube, 56, internally screw-threaded from end to end, and said circular portion provided with a slot that opens vertically close to said tube; an arm resting on said central portion and pivoted around the tube; a sheet-metal coiled spring having on the coiled end ahook with an inclined undercut whichenters said slot and interlocks therewith, and a screw whose shank passes entirely through the said vertical tube from top to bottom.

In testimony whereof Iaflix in presence of two witnesses.

FRANK A. PERSOHN. Witnesses "G. FERD. Voor,

CHAS. B. MANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

my signature 1 

